refactor (graphql-middleware): Improve re-connection flow

[gustavotrott]

Following #19784

First improvement

When Hasura Client would re-connect, it was closing the channel MsgReceivingActiveChan to inform that the channel
fromBrowserToHasuraChannel should be frozen!
Now the channel was renamed to FreezeMsgFromBrowserChan and it will just send a message to the channel instead of closing it:

It was necessary because once the channel was closed, this case would start a loop (causing increase of CPU usage):

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Second improvement

Other loop was identified when the channel fromHasuraToBrowserChannel was closed.
Now it will break the loop once it identifies the channel is closed (and the client will die soon).

[sonarcloud]

Quality Gate failed

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C Reliability Rating on New Code (required ≥ A)

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[github-actions]

Automated tests Summary

✅ All the CI tests have passed!